Pressure-governor for pumps.



W.V.TURNER PRESSURE GOVERNOR FOR PUMPS.

APPLICATION FILED NOV. 20, 1908.

1,071,829. Patented Sept. 2, 1913.

2 SHEETS-SHEET 1.

INVENTOR WITNESSES W. V. TURNER. PRESSURE GOVERNOR FOR PUMPS. APPLICATION FILED NOV. 20, 1908.

INVENTOR 7% mmw WITNESSES COLUMBIA PMMOGRAPH co., WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

WALTER V. TURNER, OF EDGEWOOD, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIR'BRAKE COMPANY, OF OF PENNSYLVANIA v and useful- Improvements in Pressuredevice.

Governors. for Pumps, of, which the fellow ing isa specificati This invention. r latest;toipressure gov ernors for; pumps, and more particularly to that type of governor in which a valve mechanism governed by pump pressure is employed for controlling the pressure on the actuating-piston of pump v q l rolling It has heretofore fbeen proposed to 'f pro vide a high tension regulating device je'ct to pump pressure and. adjusted to a predetermined hightdegreef of puinp' pres} sure and a low t ensirufI"regulatingv device subject to pump pressure and ad jlusted to predetermined low degree of pump pres'sure for-causing the movement of a matinfvalve mechanism so as to respectively cut the pump out of 'and into action, with thefdesired range between, the. cutting outfand cutting in'pressures. v I 1 One object of my inventionis to simplify the construction ofjthe governor by eliminating one regulating device, and then providing means whereby the movement ofthe main valve mechanism in one direction is directly controlled according to the degree of pump pressure acting thereon.

Still another feature of my invention consists in providing improved meansfor causing the operationof the pump governor according to the pressures from different P P is i In the accompanying drawing, Figure 1 illustrates a vertical central section of a pressure governor embodying a preferred form of my improvement and Fig. 2 a diagrammatic view of two electrically driven pump equipments coupled up with'rny invention applied thereto. I I

According to the drawings, the pressure governor shown is of that type adapted to control an electric switch in the pump motor circuit and comprises a casing 1 having a piston chamber 2 containing an actuating PRESSURE-GOVERNOR FOR PUMPS.

Specification of Letters Patent.

PITTSBURGH, PENNSYLVANIA, A CORPORATION Patented Sept. 2, 1913.

Application filed November 20, 1905. Serial No. 463,605.

piston 3 for controlling an electric switch, the movable contacts 5 of which are attached to piston stem 4 and whose fixed contacts 6 are arranged in the pump motor circuit in the usual manner. On one, Side, the piston 3 is subject to thepressure of a spring 7 and the piston is operated byvaryingthe fluid pressure on the opposite side. I @For this purpose a main Valve 10, contained in valve chamber 12 is provided, having a cavity 22 adapted in one positionjof the valve to connect port 20, opening to the chamber at the inner face of piston 3, with exhaust port 21, and adapted in another position to uncover the port 20 to valve Chamber'12. The valve 10 is operated by a movable abutment 8 contained in piston chamber 9,1 The valve chainber 12 being open'to 'the st orage reservoir of the pump jth'roughpassage 23, one side of abutment 8 is, constantlysubject to pump pressure and means are provided for permitting equalization of pressures on opposite sides of the abutment, either around the abutment or through equalizing ports in theabutment. The outer face of abutment 8 is also subject to the pressure of a light spring 17 and in traveling outwardly is adapted to engage a stem 18 bearing against a spring thimble 46 subject to the pressure of a heavier adjustable spring 19, so that in the extreme outer position the abutment 8 is subject to the pressures of both springs 17 and 19.

For causing the movement of the main valve mechanism in the outward direction a regulating valve means is provided comprising a movable diaphragm 13, subject on one side to pump pressure through passage 24 leading to valve chamber 12 and on the opposite side to the pressure of an adjustable spring 16, and a vent valve 14 adapted to be operated by said diaphragm for releasing fluid from the piston chamber 9 at the outer face of abutment v8, through a passage 15 There being no pressure in the storage reservoir, the abutment 8 is held to its inner position by spring 17 and vent piston assumes its out in position connecting the switch contacts 5 and 6. The circuit of the pump motor being closed, the pump;

compresses air into its storage reservoir and into valve chamber 12. The abutment 8 remains in its inner position, however, as, the fluid equalizes around abutment 8 to-the piston chamber 9, said abutment being a loose fit in the piston chamber 9 so as to permit air to slowly leak around"'the samei' In order to insure full and prompt move-i ment of the main valve mechanism an auxiliary valve 11, mounted on and having" a; movement relative to them ain valva maybq provided and on the first outward movement of abutment 8 said valve is carried forward. so that a cavity 25 therein connects port 22' with a port 26 in the slide valve di-:

rect communication is thus establishedlfrofm piston chamber 9 to exhaust po'rt2l, through passages 15, 28, and 27, port 26, cavity 25 and port 22, and therebygabutiiientifi isl caused to quickly move to itsextreme outer position, at first against the resistance of, spring 17 and finally, just before the ment seats, against the added resistance of,

spring 19. In the outer seated position off abutment 8, a portion of the area thereof is cut off from the pressure pistonchamber" 9,

and as the ports 22 and 26areprovided with: foot extensions, the port 27vremains inlcom-Q munication with exhaust port '21 so that the seated portion of the abiitnjient tained open to the atmosphere/The.

inaining area of the outerfa'cejfef theiabut i ment is kept at pump pressure bvjleakage' around same, but to insure thefull mainte;

nance of such pressure against possible leak-,1 age, a port 31 may be provided leading from. piston chamber 9 to the seat of the slide valve lO-and connected in the outer position.

of the parts by cavity 30 with port 29 leading to piston 3. The movement of 'main' valve 10 outwardly uncovers port 20, so that fluid is admitted to piston causing the same to be suddenly shifted I outwardly, opening the switch and stopping the pump:

It will be noted that when thef abutment 8 is seated in its outer position it. is subject on, its inner face to pump pressure and on its outer face to the pressures of springs 17 and 19 and pump pressure on a portion of its area. The spring 19 is adjusted so thatwhen the pump pressure acting on the inner face of the abutment 8 diminishes toa pre determined desired degree, the total fluid and spring pressure acting on the outer face The will move the abutment from its seat.

was; 1-

- pressure is:

of piston valve 32, the p 5 nova at at pespol i erio pressurea overc resistaiice' of spring 3 2;jand the valve I so hat ajetfb'f airffisgsupplied to thief switch; contacts, As its outer'posi 1o thus waste of 51 preliminary movement of abutment 8 from its outer seat, shifts auxiliary valve 11 so as to cut off communication from the exhaust port 21 to piston chamber 9, and consequently the full area of abutment 8 is immediately subjected to pumppressure supplied through port 31. The-fluid pressures being thus equalized on abutment 8, the springs 17 and 19' rapidly shift the main valve mechanism to its extreme inner position, in which port 20 is connected to exhaust port 21, through cavity 22, releasing fluid from piston 3 and thus ca using spring 7 to shift the piston and connect the switch contacts 5 and 6. A blow out device-such as described in application Serial No. 5395M, the subject matterof which was divided out of'the present application, may be employed in connection with the present construction, comprising piston valve 32, subject on one side to the pressure of aspring 3 3 tending to seat the valve 32 and cut off commenter-1: tion' from Q a supply port 34, leading to the chamber att h face iof pistoni to v H l e to directthe'. flow ofair'i to' t, eswitc conacts. On one side thepiston valve 32 is subject to the fluid pressure in the supply passage 341 and the oppoS.

'nist nfchi i erfl T n ti e pas 'age ,.fint lm b 2 b ing, 'q pi siti n at meFj i mii' e piste'ii is in. itsjinnerfpoition thefp rt opens to thespace above;thezpistonfwhilelyy en thepi tcn is inf its outer posit'on said p; tjopeniiigis'belcw A z r i It' will now e' seen that fluid ager? fid i' t djfiothe met- & a m ae hpassaee: 7 t iz 9 1' l ansii f idebei es ole' opens,

soon as the piston 3 assumes in tbe passage 36opens to the, a b l w ch .vi f o I djfll id il 'i br ssureis admittediitdltliespring side of pis-j ton valve ;52, ',th1j1is,eqiia1igin thei fluid pressures on the; opposite sides, so that spring is permittedjto close theivalve and out, bfi the flower, airz'to the' switch contacts. It

will be 'not'ed' thaUwitlithis construction on the. nwa .m m nt he s.

close the fswitch, ;tlie dppos'it'e sides of; piston; valve 3 2, are 'at, atmospheric pressureis'o that th. SD 'ing 33. h" dslt'he' valve 32 closed and,

' dam s k d th piston 'is'nreve f ted'. J

Where two or more'pump's are employed to compress air into a common receptacle, such as a pipeline connecting all the pump reservoirs, it hasbeen heretofore proposed to providemeansjadapte'cl to operate to c'ut in a particular pump either upon 1 ai certain decrease in its storage reservoir pressure orite sideis connected by a' ing a storage reservoir 50' connected to the pump 51'by pipe 52 containing check valve 53 and to the pipe line 54 by a pipe 55 con taining check valve 56, all of which may be oi the usual construction as heretofore employed. Passage23' of-the pump governor 59"is connected to the-pump supply pipe 52' by a pipe 57 and passage-43 thereot is connected by'pipe 58 to the pipe line 54. In'order to carry out-the feature of my invention relatingto the control of two or opening'into the'piston chamber 9 atQthe more pumpswhen coupled 'upin. a train I preferablyprovidewa piston valve 37,-"as shown Larranged j to control com-i municati'cn rom port 2-7 'to a passage: 28,

outer face "of abutment-'8'. One side of the piston valve 37 is subject'to a. spring. 39 tending-to unseat'the valve and the opposite side is open to the pressure from a passage 40 controlled by a valve 41. A movf able diaphragm 42 operates thelvalve 451 and is subject on-one side to the pump pressure'of the-particular pump, being open: to valve chamber 12, .iand on *its' oppositeside sage43 and pipe 58.

7 So'lcn'g as the pressure in the pump reser voir equals for exceeds the reservoir line pressurefthe valve t1 remains closed, and

" to reservoir-"line pressurerthrough a pas spring39fmaintains" the piston valve 37 in open position, in which port 27 is open to port 28 and the main governor mechanism of the pumpoperates as hereinbefore described, but should the reservoir line pressure become higher than the pump pressure of the particular pump, as would happen in case another pump first cuts in and starts to pump up the pressure in the pipe line 54, then this preponderating reservoir line pressure acting on the outer face of diaphragm 42 moves the diaphragm, and the valve 41 is opened to admit fluid from the reservoir line to the outer face of the piston valve 37. The piston valve is thereupon shifted to its inner position closing port 27 and opening communication from passage 40 to port 28. Fluid under pressure is thus supplied through port 28 to act on the seated area of abutment 8, if the parts are in the cut out position. The consequent equalization of fluid pressures on abutment 8, permits the springs 17 and 19 to shift the main valve mechanism to cut in position, thus supplying air to the piston 3 and causing the pump to cut in.

It will now be apparent that by means of my improvements a compact governor of few parts is provided and in which any desired range between cutting in and cutting out pressures may be accurately determined.

Having now described my invention, What I claim as new and desire to secure by Let ters Patent, is

1. A pressure governor for pumps comprising a pump controlling device, an actuating piston therefor, a main valve mechanism comprising a valve for controlling ports leading to the actuating piston through which fluid is admitted to and released from said piston, a movable abutment subject to the opposing pressures of the pump and a spring for moving-said valve in one direction upon a predetermined .idecrease in the pump pressure acting on Esaidabutment, and a regulating valve device governed by pump pressure for causing themovement of said main valve mechanism in the opposite direction upon a predetermined increase in pump pressure. 2. A pressure governor for pumps comprising a controlling device, an actuating piston therefor, a main valve for controlng the admission and release of fluid under pressure to and from said actuating piston, a movable abutment subject to pump gpressurc for operating said main valve, yielding means acting on said movable abutment in opposition to the pump pressure and adapted when the pump pressure diminishes to a predetermined point to shift said abutment, and a regulating valve device subject in one direction to pump pressure and in the opposite direction to the pressure of an adjustable spring for causing the movement of said abutment upon a predetermined increase in pump pressure.

3. A pressure governor for pumps comprising a controlling device, an actuating piston therefor, a main valve mechanism comprising a movable abutment subject on one side to pump pressure, a main valve controlled thereby and adapted in one position to supply air to said actuating piston and in another position to release airtherefrom, a spring acting on said abutment and adapted to shift the main valve mechanism to'release air from the actuating piston upon a predetermined reduction in pump pressure on said abutment, and a regulating valve device subject to pump pressure for causing the movement of the main valve mechanism to supply air to said actuating piston upon a predetermined increase in pump pressure.

4. A pressure governor for pumps comprising a controlling device, an actuating piston for said controlling device, a valve for controlling the fluid pressure on said actuating piston. a movable abutment for operating said valve subject on one side to pump pressure and having means for permitting equalization of fluid pressure on its opposite sides, means for subjecting a portion of the area of said abutment to fluid at pump pressure in one position, and means acting on said abutment for shifting same from said position when the pump pressure falls to a predetermined point.

5. A pressure governor for pumps comprising a controlling device, an actuating piston for said controlling device, a valve for controlling the fluid pressure-on said actuating piston, a movable abutment, for operating said valve subject on one side to pump pressure and having means for permitting equalization of fluid pressure on its opposite sides, said abut-ment being adapted to seat in one position and thereby reduce the area on one side subject to pump pres sure, and a spring device acting on said abutment and adapted to shift same from said position When the pump pressure on the abutment diminishes to a predetermined point. ,g; 6. A pressure governor for pumps comprising a controlling device, an actuating piston therefor, a main valve mechanism comprising a valve for controlling the fluid pressure 'on said actuating piston,'-a movable abutmentsu-bject on one side to-plump pres sure and adaptedto permit qualizatiomof; fluid pressures on its oppositesides amegw lating valve device subject .to pump-pres sure for causing the movement 0t said main valve mechanismto a positiom-seating the. movable abutment and-thereby cutting ofifiaf portion of thearea of said: abutmentafro'm the action of pump pressure, anda-Spring device adapted to shift saidzabuti'nentfnom its seat when the pump pressure actingmn the abutment diminishes to a predetermined point. .7 -1 7. A pressure governor comprising a controlling device andijzan actuating pistomia: main-valve and: movable abutmentsubjecton one side to pump pressure, means for perimitting equalization of pressures around said abutment, a regulating valve rmeans-j operated by'pumppressure for. releasing Q fluid from the other sideof said abutment-,-

Copies of this patent'in'ay be obtained to shifting said abutment 'firstposition; is

thereby causing said abutment to be shifted to a certain position, said abutment having a seat adapted ztO cut off a portion of the area of same from pump pressure in said position, and means subject to the opposing pressures from different pumps for control ling the admission of fluid to the seated por-v tion of said abutment.

8. Azpressure governor comprising a controlling device and an actuating piston, a main valve for governing the fluid pressure on said actuating piston, a movable abutment subject on one side to pump pressure and having means for permitting equalization of pressures on opposite sides thereof, a spring device tending to shift the main valve and abutment to one position, a regulating valve means subject to pump pressure for releasing fluid from one side of said abutment to shift same to another position, said abutment being provided witha seat adapted in said latter position tocut 'ofi a portion of the area of.-s'aid abutment from pump pressure, and" means subject to opposing pressures from ,difierent pumps for controlv ling the admission of fluid under pressure to said" seated portion; ofgthe abutment, for -and valve to said -9;. A pressure governor comprising a conitrolling device. and'an actuating piston, a main valve for governing thefluidr-pressure one-said actuating piston, a Vmovable abutf'mnt subject to the opposing-pressures of the pump and a spring means for operating 'said mainqvalve 1n onedire'ction-and a regulating svalveameans governed by pump pressure for varying the pressure ;on said abutment to operate:said mainwvalve in the foppositehzdirection. V -o v w v 1 lntestimonywwhereof- I-have hereunto set my handil I V. TURNER. Witnesses:

M. CADY,

A. i M. CLEMnNrrs;

r five cents each, by addressing the Commissioner of Patents. Washington, D. C." 

